Name any four Pollutants

TLV values of four pollutants A, B, C and D are 2 ppm, 9 ppm, 20 ppm and 50 ppm. Among these four pollutants which one is the most toxic pollutant ? Why?

TLV values of four pollutants A,B,C and D are 2ppm, 9 ppm, 20 ppm and 50 ppm. Among these four pollutants which one is the most toxic pollutant ?

Name the main pollutants in the atmosphere.

Give examples to any two pollutants.

Name any four enzyme catalysed reactions.

Give the names of any four protostomian phyla.

Are there any visible pollutants in the water sample ?

Name any four examples of preparation of colloids by chemical methods with necessary chemical equations.